<template>
  <div>
    <!-- 面包屑导航区 -->
    <Breadcrumb :List="list"></Breadcrumb>
    <el-card>
      <el-row :gutter="20">
        <el-col :span = "4">
          <el-button type="primary" @click="addDialogVisible = 'true'">添加角色</el-button>
        </el-col>
      </el-row>
      <el-table :data = "RolesList" stripe border>
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class = "['bdbottom', i1 === 0 ? 'bdtop':'', 'vcenter']" v-for="(item1,i1) in scope.row.children" :key = item1.id>
              <el-col :span="5">
                <!-- 渲染一级权限 -->
                <el-tag closable @close = "removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <el-col :span = "19">
                <!-- 渲染二级三级权限 -->
                <el-row :class="[i2 === 0 ? '':'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key = "item2.id">
                  <el-col :span = "6">
                    <el-tag closable @close = "removeRightById(scope.row, item2.id)" type="success">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span = "18">
                    <el-tag closable @close = "removeRightById(scope.row, item3.id)" type="warning" v-for="(item3) in item2.children" :key = "item3.id">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini" @click = "showEditDialog(scope.row.id)">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size = "mini" @click = "DeleteRolesById(scope.row.id)">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" size="mini" @click = "showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="30%" @close = "addDialogClosed">
      <!-- 内容主体区域 -->
      <el-form :model="addForm" :rules="FormRules" ref="addFormRef" label-width="80px">
        <el-form-item label="角色名" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 对话框底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false" >取 消</el-button>
        <el-button type="primary" @click="addRoles">确 定</el-button>
      </span>
    </el-dialog>
    <el-dialog
      title="修改角色信息"
      :visible.sync="editDialogVisible"
      width="30%" @close = "editDialogClosed">
      <el-form :model="editForm" :rules="FormRules" ref="editFormRef" label-width="80px">
        <el-form-item label="角色编号">
          <el-input v-model="editForm.roleId" :disabled = "true"></el-input>
        </el-form-item>
        <el-form-item label="角色名" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoles">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%" @close = "setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="TreeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref = "TreeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRight">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
import Breadcrumb from '../Breadcrumb.vue'
export default {
  components: { Breadcrumb },
  data () {
    return {
      list: ['权限管理', '角色列表'],
      // 角色列表
      RolesList: [],
      // 控制增加角色对话框是否显示
      addDialogVisible: false,
      // 控制编辑角色对话框是否显示
      editDialogVisible: false,
      // 控制权限分配对话框是否显示
      setRightDialogVisible: false,
      // 角色所有权限数据
      rightslist: [],
      // 修改角色对象
      editForm: {},
      // 默认选中的节点id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: '',
      // 树形控件绑定对象
      TreeProps: {
        label: 'authName',
        children: 'children'
      },
      // 添加角色对象
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 表单规则
      FormRules: {
        roleName: [
          {
            required: true,
            message: '请输入角色名',
            trigger: 'blur'
          }
        ],
        roleDesc: [
          {
            required: true,
            message: '请输入角色描述',
            trigger: 'blur'
          }
        ]
      }
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取角色列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('请求角色列表失败')
      }
      this.RolesList = res.data
    },
    // 添加角色
    async addRoles () {
      this.$refs.addFormRef.validate(async valid => {
        // 验证表单是否符合规则
        if (!valid) {
          return
        }
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) {
          return this.$message.error('添加角色失败')
        }
        this.$message.success('添加角色成功')
        this.addDialogVisible = false
        this.getRolesList()
      })
    },
    // 删除角色
    async DeleteRolesById (id) {
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除角色失败!')
      }
      this.$message.success('删除角色成功!')
      this.getRolesList()
    },
    // 编辑角色前根据id查询角色信息
    async showEditDialog (id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询角色信息失败!')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 展示分配权限对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }
      // 把获取到的权限数据保存到data中
      this.rightslist = res.data
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 根据id删除对应的权限
    async removeRightById (role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }
      role.children = res.data
    },
    // 为角色分配权限
    async allotRight () {
      const keys = [
        ...this.$refs.TreeRef.getCheckedKeys(),
        ...this.$refs.TreeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    },
    // 修改角色信息
    editRoles (id) {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) {
          return
        }
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        })
        if (res.meta.status !== 200) {
          return this.$message.error('更新角色信息失败!')
        }
        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getRolesList()
        // 提示修改成功
        this.$message.success('更新角色信息成功!')
      })
    },
    // 监听添加角色对话框的关闭事件
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 监听修改角色信息对话框的关闭事件
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 通过递归形式，获取角色下所有三级权限的id，并保存到defKeys数组中
    getLeafKeys (node, arr) {
      if (!node.children) {
        // 如果当前node节点不包含children属性，则是三级节点
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    }
  }
}
</script>

<style scoped>
.el-tag{
  margin: 7px;
}

.bdtop{
  border-top: 1px solid #eee;
}
.bdbottom{
  border-bottom: 1px solid #eee;
}
.vcenter{
  display: flex;
  align-items: center;
}
</style>
